It’s not just humans getting high, a new study shows. It’s their pets as well.

The survey, conducted by a Florida rehab center, found more than 1,000 incidences of pets ingesting some form of mind-altering or toxic substance with some type of adverse effect.

Alcohol, marijuana and over-the-counter drugs all made the list.

Much attention has been paid to the impact that drug use can have on the friends and family members of users. This survey, however, focuses on people’s canine and feline companions, said Logan Freedman, who helped compile the information for the Family Center for Recovery in Lantana, Florida.

“One of the major reasons that we did this study and one of the big factors is that drug addiction can affect not only the person addicted to drugs, but it can affect the people and animals around them, too,” said Freedman, who shares his home with two dogs, two cats and a lizard. “These are innocent animals getting into substances they don’t understand.”

Not surprisingly, given dogs’ if-I-see-it-I-will-eat-it nature, the survey found that canines were three times as likely as cats to ingest toxic substances.

When pets do get into the hard stuff, they’re likely to find substances that most of us have in our home, the study found. Almost 30 percent of all incidences reported in the survey involved alcohol and 21 percent involved over-the-counter drugs. Alcohol even in small quantities can be highly toxic for animals, causing vomiting, diarrhea, and even death.

Marijuana appears to be the most popular drug of choice for pets, according to the survey. More than 21 percent of respondents said their pet had consumed marijuana through edibles, another 20 percent said their pet had experienced a contact high, and nearly 15 percent said that their pet had indulged after getting into their stash. Respondents could choose more than one response.

That comes as little surprise to Dr. James Speiser, veterinarian and owner of IndyVet, which offers animal care 24 hours. The most common animal-drug interaction he sees in the emergency room involves dogs who have ingested marijuana. Give-away symptoms include dilated eyes, disorientation and anxiety, Speiser said.

Often, however, people don’t come clean right away about what’s going on.

“It’s kind of a difficult conversation to have, because no one wants to admit, ‘Hey the dog got into the stash’ and yet we kind of need to know that in order to properly treat them," he said. “Sometimes the people won’t cough it up.”

Usually treatment consists of fluids and in some cases sedation, if the dog is “amped up” because of the drug, Speiser said. They’ll put the dog in a dark cage to calm it down, while the cannabis works through the animal’s system, usually over the course of 12 to 18 hours.

Although the survey noted a small number of animals getting into methamphetamine and cocaine, Speiser said that’s not a problem his practice has seen. However, he has seen dogs who have gotten ahold of bottles of prescription drugs like “Grandma’s antipsychotic medication” and chewed it up, bottle and all.

Perhaps most surprisingly, the survey found that nearly 45 percent of respondents who saw their pet consume something that was potentially harmful took no action to protect that animal. About 35 percent did call their veterinarian for help.

As for your cat and catnip, there's little need to worry. Although catnip has a decided effect on felines — and no other type of animals — it’s not a psychotropic drug. While theoretically cats can over-ingest this intoxicating herb, which can lead to vomiting and diarrhea, for the most part they know when they have had enough, experts say.

Call IndyStar reporter Shari Rudavsky at (317) 444-6354. Follow her on Facebook and on Twitter.